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  출처 : http://introcs.cs.princeton.edu/java/11cheatsheet/ Appendix D:   Java Programming Cheatsheet This appendix summarizes the most commonly-used Java language features in the textbook. Here are the APIs of the most common libraries. Hello, World. Editing, compiling, and executing. Built-in data types. Declaration and assignment statements. Integers. Floating-point numbers. Booleans. Comparison operators. Printing. Parsing command-line arguments. Math library. The full java.lang.Math API. Java library calls. Type conversion. If and if-else statements. Nested if-else statement. While loops. For loops. Loops. Break statement. Do-while loop. Switch statement. Arrays. Inline array initialization. Typical array-processing code. Two-dimensional arrays. Inline initialization. Our standard output library. The full StdOut API. Our standard input library. The full StdIn API. Our standard drawing library. The full StdDraw API. Our standard audio library. The full StdAudio API. Redirection and piping.                Functions. Libraries of functions. Our standard random library. Our [ more… ]